Maarn is a town in the Dutch province of Utrecht. It is a part of the municipality of Utrechtse Heuvelrug, and is located about 10 km east of Zeist.
In 2001, the town of Maarn had 4,071 inhabitants. The built-up area of the town was 1.26 km², and contained 1,793 residences.
Until 2006, Maarn was a separate municipality, covering both Maarn and Maarsbergen.
Maarn is a small village in the heart of the Utrechtse Heuvelrug, a protected nature reserve in the Netherlands. The village has approximately 8,000 inhabitants, has a very small center and is probably best known for its tourism to the numerous camp-sites that surround the village.